Enable hardware CI for Vue GUI

What changes are made:
    - Added following basic test cases for Vue GUI testing:
        - Verify Header Text
        - Verify GUI Logout
    - Vue GUI tests are added in new "gui_test" folder
    - Added new file WEBUI_CI to run hardware CI for Vue GUI

Change-Id: Id341a5984b3e5c91f38e41017dae24deeee0b738
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/gui/data/resource_variables.py b/gui/data/resource_variables.py
index 64362a5..3e8a942 100644
--- a/gui/data/resource_variables.py
+++ b/gui/data/resource_variables.py
@@ -116,3 +116,7 @@
     xpath_individual_event_export = \
         "//*[@id='event__actions-bar']/div[2]/div[2]/a"
     xpath_select_all_events = "(//*[@class='control__indicator'])[1]"
+
+    # New GUI variables
+    xpath_login_button = "//button[@type='submit']"
+    xpath_logout_button = "//button[@id='app-header-logout']"